Bugreport GIF to WebM transparency

gistfile1.json

{
  "bugReport": {
    "client": {
      "url":"http://www.darklyrics.com/",
      "description":"Gif transcoded to webm no longer has transparency information. The logo in the top center of the page should have a black background, not a white background.",
      "system": {
        "name":"Firefox",
        "platform":"winnt",
        "version":"33.0a2",
        "vendor":"Mozilla"
      }
    },
    "server": {
      "logging": {
        "level":"debug",
        "colorize":true,
        "console": {
          "enabled":false,
          "level":"debug",
          "timestamp":false,
          "colorize":true
        },
        "file": {
          "enabled":true,
          "level":"error",
          "timestamp":true,
          "maxSize":20,
          "json":false,
          "filename":"proxy.log",
          "clobber":false
        }
      },
      "cluster": {
        "enabled":true,
        "workers": {
          "auto":true,
          "count":8
        }
      },
      "proxy": {
        "port":44300,
        "sslKeyPath":"./keys/dev.key",
        "sslCertPath":"./keys/dev.crt",
        "followRedirects":false
      },
      "pac": {
        "port":8000,
        "tunnelSsl":false
      },
      "dom": {
        "enabled":true
      },
      "fork": {
        "enabled":false,
        "optional":false
      },
      "ingress": {
        "enabled":true,
        "accumulateUnknownLengths":true
      },
      "egress": {
        "enabled":true
      },
      "gunzip": {
        "enabled":true
      },
      "cache": {
        "enabled":false,
        "type":"basic",
        "database": {
          "host":"localhost",
          "port":55255
        },
        "expire": {
          "default":86400,
          "max":86400
        },
        "items": {
          "limit":0,
          "size": {
            "min":0,
            "max":51200
          }
        },
        "memory": {
          "limit":2000
        }
      },
      "imgcompression": {
        "enabled":true
      },
      "adblock": {
        "enabled":false,
        "optional":true,
        "listUrl":"http://pgl.yoyo.org/adservers/serverlist.php?&mimetype=plaintext"
      },
      "xz": {
        "enabled":true,
        "level":8
      },
      "gzip": {
        "enabled":true,
        "level":9
      },
      "gif2video": {
        "enabled":false,
        "optional":true
      },
      "metrics": {
        "enabled":true,
        "interval": {
          "systemUpdate":10
        },
        "statsd": {
          "host":"localhost",
          "port":55355,
          "prefix":"janus",
          "spawn":false,
          "flushInterval":10000,
          "backends":["statsd-console-backend"],
          "graphiteHost":"localhost",
          "graphitePort":55455,
          "console": {
            "prettyprint":true
          }
        }
      },
      "version":"0.3.1",
      "title":"janus/0.3.1",
      "name":"janus"
    }
  }
}